Custard.
Buy some long troughs and make up thick custard to put in. Add a heating element to keep the custard nice and warm. Make sure the cables are suspended so they are covered by the custard but not sitting on the bottom or sides of the troughs.
Buy some long troughs and make up thick custard to put in. Add a heating element to keep the custard nice and warm. Make sure the cables are suspended so they are covered by the custard but not sitting on the bottom or sides of the troughs.